采用铜模吸铸法制备了(Nd0.7Pr0.3)60-xFe30Al10Cux (x=0,l,2,4)大块非晶合金,利用振动样品磁强计(VSM)研究了该合金的磁性能和磁粘滞行为.结果表明,这几种合金都呈现出较好的硬磁性.随着Cu元素的添加,矫顽力略有增加,但是合金的剩磁却没有变化.利用扫描速率法研究了(Nd0.7Pr0.3)60-xFe30Al1 0Cux (x=0,1,2,4)大块非晶合金的磁粘滞行为,得到了这几种合金的相关磁性参数:热扰动场Hf为12.1～15.2 mT,热激活体积va为1.5× 10-18～1.9× 10-18 cm3.在所研究的合金中都存在明显的铁磁交换耦合作用,同时矫顽力与温度之间的关系符合Gaunt提出的畴壁钉扎模型,合金的硬磁性可能是这两方面共同作用的结果.
参考文献
| [1] | Collocott, SJ .Temperature dependence of the coercivity in Nd60Fe30-xCoxAl10, x=0 or 10, and Pr58Fe24Al18 bulk amorphous ferromagnets[J].Journal of Magnetism and Magnetic Materials,2010(16):2281-2286. |
| [2] | Chiriac H.;Lupu N. .Magnetic properties of (Nd,Ce,Pr)-Fe-(Si,Al) bulk amorphous materials[J].Journal of Magnetism and Magnetic Materials,1999(0):235-237. |
| [3] | Bracchi A;Samwer K;Niermann T;Seibt M;Schneider S .Phase separation and magnetic properties of Nd60Fe30Al10 thin films[J].Applied physics letters,2004(13):2565-2567. |
| [4] | Ortega-Zempoalteca, R;Betancourt, I;Valenzuela, R .Thermomagnetic transitions and coercivity mechanism in bulk composite Nd60Fe30Al10 alloys[J].Journal of Magnetism and Magnetic Materials,2009(19):3159-3163. |
| [5] | Tan, X.H.;Collocott, S.J.;Xu, H. .Sweep rate and temperature dependence of the coercivity in Nd 60 _(-x) ~(Fe 30Al 10Dyx), x=0, 2 and 4, bulk amorphous ferromagnets[J].Journal of Magnetism and Magnetic Materials,2012(16):2565-2571. |
| [6] | Collocott SJ;Dunlop JB .The fluctuation field and anomalous magnetic viscosity in commercial NdFeB alloys, AlNiCo and the bulk amorphous ferromagnets Nd_60Fe_30Al_10 and Nd_60Fe_20Co_10Al_10[J].Journal of Magnetism and Magnetic Materials,2008(16):2089-2093. |
| [7] | Collocott, SJ;Dunlop, JB .Magnetic and anomalous magnetic viscosity in the bulk amorphous ferromagnet Pr58Fe24Al18 and partially amorphous ferromagnet Pr60Fe24Al16[J].Journal of Magnetism and Magnetic Materials,2009(19):3293-3299. |
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